新型尾砂胶结剂胶结分级尾砂充填体强度研究  

Strength of cemented classifying tailings backfilled by new cementing agent

作　　者：刘贤俊[1,2] 何文[3,2] 谢勇[1,2] 刘浩[3,2] 谢涛[1,2] 

机构地区：[1]江西理工大学建筑与测绘工程学院,江西赣州341000 [2]江西理工大学江西省矿业工程重点实验室,江西赣州341000 [3]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2015年第2期72-79,共8页Nonferrous Metals Science and Engineering

基　　金：江西省科技支撑计划项目(20141BBG70097);江西省自然科学基金项目(20132BAB216019)

摘　　要：结合某矿山实际,采用实验室试验与数值模拟相结合的手段,研究了新型尾砂胶结剂胶结分级尾砂充填体力学强度特性及其作为采场顶板的稳定性.单轴抗压试验与巴西劈裂试验结果表明,灰砂比为1∶6、1∶12的新型尾砂胶结剂胶结分级尾砂充填体在7 d、14 d、28 d、60 d养护龄期的抗压、抗拉强度,分别高于所对应灰砂比为1∶4、1∶8的42.5级水泥胶结分级尾砂充填体;并且灰砂比为1∶6、1∶12的新型尾砂胶结剂胶结分级尾砂充填体的早期抗压、抗拉强度均优于对应灰砂比为1∶4、1∶8的42.5级水泥胶结分级尾砂充填体;FLAC3D数值模拟结果表明:新型尾砂胶结剂胶结分级尾砂充填体,可以满足作为采场充填顶板的要求.Given the practical situation of a copper mine and using the means of combining laboratory experiments with numerical simulation,the characteristics of the mechanical strength cemented classifying tailings backfilled by new cementing agent and the stability of them used as stope roof are studied. Uniaxial compression test and Brazilian splitting test results show that in the curing age of 7 d, 14 d, 28 d and 60 d, the uniaxial compressive strength, and tensile strength of cemented classifying tailings backfilled by new cementing agent when mixture ratio are 1 to 6 and 1to 12 are higher than that of cemented classifying tailings backfilled by 42.5# cement when mixture ratios are 1 to 4 and 1 to 8.While the early compressive strength and tensile strength of the former is superior to the latter. The numerical simulation results of FLAC3 Dshow that the strength of cemented classifying tailings backfilled by new cementing agent can meet the requirements of filling stope roof.

关 键 词：胶结分级尾砂充填体 单轴抗压试验 巴西劈裂试验 数值模拟 顶板稳定性 

分 类 号：TD853.34[矿业工程—金属矿开采]